Rotary steam-engine



(No Model.) 4 Sheets-Sheet 1.

C. V. N.[j.RII1\T.y ROTARY STEAM ENGINE.

No. 417,196. Patented Deo. 10, v1889.

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0. V MARTIN. ROTARY STEAM ENGINE'.

No. 417,196. EPauemd Dec. 1o, 188g.

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ROTARY STEAM ENGINE. No. 417.196. Patented Dem-10, 18891l N l T Dm. vA. M l V. U

4 Sheets Sheet 4.

(No Model.)

ROTARY STEAM ENGINE.

' Patented Deo. 10, 1889.

No. 417,196.v

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UNITED STATES PATENT OFFICE.

CHARLES VALLANDIGIIABI MARTIN, OFJWOXAIILA, OHIO.

ROTARY STEAM-ENGINE.

SPECIFICATION forming part of LettersPatent No. 417,196, dated December 10, 1889.

Application filed June 20, 1889. Serial No. 314,920.' (No modeli). i i

To all whom it may concern.-

Be it known that l, CHARLES VALLANDIG HAM MARTIN, a citizen of the United States, and a resident of Moxahala, in the county of Perry and State of Ohio, have invented certain new and useful Improvements in Rotary Steam-Engines; and I do hereby declare that the following is a full, clear, and` exact description of the invention, which will enable others skilled in the art to whichit appertains to make and use the same.

The invention relates to improvements in rotary steam-engines; and it consists in the construction and novel combination of parts hereinafterdescribed,illustrated in the drawings, and pointed out in the appended claims.

In the accompanying drawings, in which similar letters of reference refer to corresponding parts, Figure l is a central vertical longitudinal section of a steam-engil'ie embodying my invention. Fig. 2 is a central horizontal section of the same. Fig. 3 is a transverse section through the cylinder. Fig.

.4 is a detail sectional vieuT of the reversingvalve. Fig. 5 is a detail sectional view of the abutment chambers and plates. Fig. G is a detail perspective view of the central packingring; and Fig. 7 represents detail sectional views of the cylinder, piston, arms d, packing'- rng, and block e.

Referring to the drawings by letter, A designates the bed of the machine, of suitable shape, but preferably rectangular generally, and having bearings at suitable points for the main or driving shaft .13, as shown.

C is a circular cylinder, of suitable crossseotion, secured to the bed by proper means and having the central space c Within it for rotation of the piston-block D, which block is secured to the adjacent end of the" shaft B and has the arms (l d extending through the circumferential opening from the 4central space c into the piston-\vay c of the cylinder. The cylinder is preferably circular in crosssectiou. rlhe pistonblock is surrounded by a packing-ring d', triangular in cross-section, resting against a shoulder on t-he block and with its edge bearing on the packing-ring of the piston. Bet-Ween said arms is secured the piston E, of suitable shape to t Within the Way c', there being an opening through the piston and registering openings in the arms d, so that a piu or bolt can pass through the said openings and attach the piston to the arms. The opening in the piston is larger than said bolt to permit the piston to travel truly in the piston-Way c. A packing-ring c rests against and surrounds the piston, the said ring being suitably spliced between the arms d. The splice is covered by a block e', that stands between the side plates that compose the piston.

The shaft B passes through a stuiiing-box F, standing centrally from the adjoining side of the cylinder and hav-ing an inwardly-ta pered interior space, intowhich the sets of semicircularly-seetioned packing-rings Af are inserted and respectively break joints With each other. The said rings can be tightened intheir seat by disk f and screws passing through said disk and engaging in threaded openings in the edge of the stuffing-box.

The piston-block D has its end that connects to the shaft conical or beveled, so that a circular steam-chamber g is formed in the adj acent central part c of the cylinder, into which chamber the' steam-port G opens, as shown. The piston-block is provided with the axial recess H, of suitable diameter, aligned with the main shaft, from which extend the similar ports h 7L, arranged at a suitable angle to each other and giving communication between the recess AII and the piston-Way c. rlhe piston-block is also provided at its tapered end with the steam-ducts h leading from the end of the recess II into the steamchamber g, as shown, and taking steam into said recess.

An exhaust pipe or port I stands laterally from a hollow box r1, flanged outwardly at its edge and packed and bolted at said iia-nge upon the outer 'side of the cylinder over the mouth of the recess H, so that the said recess and exhaustp01t can communicate.

.l is a valve seated in the recess H and provided with a diagonal or inclined partition j, which extends from its inner end toward its front and has the openingsj j2 on each side of it. The outer end of said valve is provided with a circumferential flange fitting in a corresponding recess in the recess H and resting against the outer Wall of the central space c.

K is a rod passing axially into the recess l-I IOO . shoes tit upon the surface of a cam-wheel P,

plates M M, preferably rectangular, which and valve .l and squared wlere it passes through the partition j to cause the valve to turn with it and at the same time not be bound longitudinally thereon. The partition is provided with a shoulder j" on its faces, and the rod K has a nut that rests against said inner shoulder and prevents the passage of steam through the opening in the partition. The said rod has on its outer end a hand-wheel or lever, as shown, and on its i11- ner end a lateral projection 7i: at right angles to its stem and resting in a groove 7.1', that is at the end of the recess ll, which conununicates with the steam-ducts 71,.

The vrod K passes through a stuiiing-box standing outward from the base of thc box I and preventing` the escape of steam.

Standing from the cylinder at opposite points, separable or integral therewith and parallel to the main shaft, are the abutmentchainbers L, that open into the piston-way, and Within said chambers are the abutmenthave their inner edges that rest against the piston-block thicker than their outer edges, so that the said plates appear Wedge-shaped when viewed edgewise. This reduces wear on the piston-block. Thesaid abutmentplates are secured at their edges tothe abutment-rods N, which pass through stuffingboxes n at the ends of the corresponding abutment-chambers L, and thence extend through suitable guides secured to the bed or frame of the engine. The abutmentplates M, when in the cylinder, rest in suitable recesses or seats m in and transverse to the cylinder. To the rods N are secured the curved director-shoes '0, from which stand inward Afingers o, that preferably have anti- :fricticn rollers mounted on them. The said of suitable construction, secured to the main shaft, and the anti-friction rollers enter t-he cam-groove p of the said wheel, which groove has the inclined portion p', so shaped and situated that as soon as the piston passes an abutment-chamber the corresponding abutment-plate is forced into the cylinder behind it, and as soon as the steam is exhausted from the cylinder on the side of the plate opposite the piston the piston is withdrawn from the cylinder. The ports 7l extend f rom the recess ll at such an angle to each other that both will open on the same side of the opposite abutment-plates at proper times, so thatone will deliver steam behind the piston and the other will exhaust before the piston.

The steam enters through the ports G, chainber g, and steam-ducts 7L into the groove k', whence it passes through the opening j on the inner side of the partition j of the Valve .l into the adjacent port h, and thence into the piston-way c behind the piston. The exhaust-steam escapes through the opposite port 7L into the openingj2 on the outer side of the partition j, thence into the recess lil, and thence from the exhaust-port l.

It is obvious that by turning the valve J one-half way round in the recess 1I by means of its rod and hand-wheel the rela-tion of the openingsjj2 to the ports 71J will be reversed, and consequently the piston will rotate in the opposite direction or the engine will be reversed. A quarter-turn will stop the engine, as the ports will then not register.

Having described my invention, I claiml. The combination, with the piston and piston-block having the recess H, ports 7L, ducts h', and groove k', of the valve J, having the partition j and openingsjj?, and the valve-rod K, having a hand-wheel on its outer end and the projection k on its inner end, substantially as specified.

2. The combination, with the cylinder, main shaft, cam-Wheel, piston-block provided With recess H, ports 7i, chiots h', and groove 7c', of the valve J, having the partition j and openings ,7" jig, the abutment-cha'mbers, abutmentplates, abutment-rods, and director-shoes attached to lsaid rods, substantially as specified.

In testimony that I claim the foregoing as my own I have hereunt'oaffixed my signature in presence of two Witnesses.

PHILIP SHERIDAN LAZARUS. WILLIAM SHERMAN LAZARUs. 

